fix: Respect timezone for natural language date parsing and align custom date ranges to dates by default to ensure backward compatibility

Author: paveltiunov

packages/cubejs-api-gateway/dateParser.test.js

@@ -0,0 +1,20 @@
+/* globals describe,test,expect */
+
+const dateParser = require('./dateParser');
+
+describe(`dateParser`, () => {
+  test(`custom daily ranges returns day aligned dateRange`, () => {
+    expect(dateParser('from 1 days ago to now', 'UTC')).toStrictEqual(
+      [dateParser('yesterday', 'UTC')[0], dateParser('today', 'UTC')[1]]
+    );
+  });
+
+  test(`last 6 hours`, () => {
+    expect(dateParser('last 6 hours', 'UTC')).toStrictEqual(
+      [
+        new Date((Math.floor(new Date().getTime() / (1000 * 60 * 60)) - 7) * (1000 * 60 * 60)).toISOString().replace('Z', ''),
+        new Date((Math.floor(new Date().getTime() / (1000 * 60 * 60))) * (1000 * 60 * 60) - 1).toISOString().replace('Z', '')
+      ]
+    );
+  });
+});